若一个二端口电路是互易的,则二端口电路一定不含有受控源。
A. 对
B. 错
任何一个二端口网络,总是满足互易定理的。
A. 对
B. 错
How long did the meeting between Premier Li andMarcia McNutt last?
A. 30 minutes
B. 70 minutes
C. 60 minutes
D. 45 munites
"Wu Wei" is a central concept of ____________?
A. Confucianism
B. Taoism
C. Buddhism
D. Christianism